(4u+7)(5u-1)=0

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Solution for (4u+7)(5u-1)=0 equation:


Simplifying
(4u + 7)(5u + -1) = 0

Reorder the terms:
(7 + 4u)(5u + -1) = 0

Reorder the terms:
(7 + 4u)(-1 + 5u) = 0

Multiply (7 + 4u) * (-1 + 5u)
(7(-1 + 5u) + 4u * (-1 + 5u)) = 0
((-1 * 7 + 5u * 7) + 4u * (-1 + 5u)) = 0
((-7 + 35u) + 4u * (-1 + 5u)) = 0
(-7 + 35u + (-1 * 4u + 5u * 4u)) = 0
(-7 + 35u + (-4u + 20u2)) = 0

Combine like terms: 35u + -4u = 31u
(-7 + 31u + 20u2) = 0

Solving
-7 + 31u + 20u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-7 + -4u)(1 + -5u) = 0

Subproblem 1

Set the factor '(-7 + -4u)' equal to zero and attempt to solve: Simplifying -7 + -4u = 0 Solving -7 + -4u = 0 Move all terms containing u to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -4u = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -4u = 0 + 7 -4u = 0 + 7 Combine like terms: 0 + 7 = 7 -4u = 7 Divide each side by '-4'. u = -1.75 Simplifying u = -1.75

Subproblem 2

Set the factor '(1 + -5u)' equal to zero and attempt to solve: Simplifying 1 + -5u = 0 Solving 1 + -5u = 0 Move all terms containing u to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -5u = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -5u = 0 + -1 -5u = 0 + -1 Combine like terms: 0 + -1 = -1 -5u = -1 Divide each side by '-5'. u = 0.2 Simplifying u = 0.2

Solution

u = {-1.75, 0.2}

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